Re: array of domain types
От | konstantin knizhnik |
---|---|
Тема | Re: array of domain types |
Дата | |
Msg-id | 136DD549-85D1-4F81-AD7F-EEDE348C8933@postgrespro.ru обсуждение исходный текст |
Ответ на | Re: array of domain types (Thom Brown <thom@linux.com>) |
Ответы |
Re: array of domain types
|
Список | pgsql-hackers |
On Jun 1, 2016, at 4:37 PM, Thom Brown wrote:
On 1 June 2016 at 14:20, Konstantin Knizhnik <k.knizhnik@postgrespro.ru> wrote:I wonder why domain types can not be used for specification of array element:
create domain objref as bigint;
create table foo(x objref[]);
ERROR: type "objref[]" does not exist
create table foo(x bigint[]);
CREATE TABLE
Is there some principle problem here or it is just not implemented?It's not implemented, but patches welcome.
Thom
The patch is trivial: just use typbasetype in get_array_type if typtype is TYPTYPE_DOMAIN:
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c
index cb26d79..ecfbb20 100644
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -2486,7 +2486,18 @@ get_array_type(Oid typid)
if (HeapTupleIsValid(tp))
{
result = ((Form_pg_type) GETSTRUCT(tp))->typarray;
- ReleaseSysCache(tp);
+ if (result == InvalidOid && ((Form_pg_type) GETSTRUCT(tp))->typtype == TYPTYPE_DOMAIN) {
+ typid = ((Form_pg_type) GETSTRUCT(tp))->typbasetype;
+ ReleaseSysCache(tp);
+ tp = SearchSysCache1(TYPEOID, ObjectIdGetDatum(typid));
+ if (HeapTupleIsValid(tp))
+ {
+ result = ((Form_pg_type) GETSTRUCT(tp))->typarray;
+ ReleaseSysCache(tp);
+ }
+ } else {
+ ReleaseSysCache(tp);
+ }
}
return result;
}
Any problems with it?
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